Header connection



April 8, 1941.

H. TREDE I 2.237.617

HEADER CONNECTION Filed March 22, 1939 2 Sheets-Sheet 1 Hana Wade,

T N In ven'i'or':

April 8,1941. TREDE 2.237.617

HEADER CONNECTION Filed March 22, 1959 2 Sheets-Sheet 2 HknaTrea'ZeJnven Zor:

relatively short so that the Patented Apr. 8, 1941 HEADER CONNECTION itHans Trede, KasseI-Wilhclmshohe, Germany Application March 22, L939,Serial No. 263,521 In Germany March 30, 1933 2 Ulaims. (or. est-L235)'llhis invention is directed to a heat exchange system, and particularlyto the construction of collectors for vaporizer tubes such as the tubesin the secondary boiler of an indirect steam generating system,

lln object of the invention is to provide a novel connection through thewall of the boiler between the collecting headers and the tubes of aprimary steam generating system.

Generally, this and other tlon are obtained by arranging the the drum inadjacent vertical rows with each vertical row of tubes connected to'avertically extending collector. Each collector is subdivided tubeswithin into two vertically extending chambers which are continued into aportion of the collector which projects through the drum. A specialfitting perslnaller. its the fitting is upon the exterior of the drum,the entire part of the collector within the drum is available for theattachment of tubes.

"these and other objects of the invention may be more readily understoodby reference to the accompanying drawings, in which:

l is a longitudinal cross sectional view through the boiler drum of anindirect steam gencrater.-

ll lg. 2 is a ll-t of Fig. l.

t le. 3 is an enlarged cross sectional view of a part ot' the boilershowing a vertical row of heatthe tubes joined to a collector, and across sectlonal view of an adjacent collector.

l 'lg. a is a cross sectional view on the line 4l oi? t le. 3.

t tle. 5 is a. cross sectional View on the line 55 of his. 3; and v 7his. t is a cross sectional view on the line 6-6 ol the. d.

Mounted within rollty of collectors cross sectional View on the linetheboller drum 2 are a plu- 4, these collectors being arranged andspaced in parallel rows adjacent the mid-point of, and transversely of,drum 2. As shown, there are two rows of four vertically extendingcollectors.

vertical row of tubes forming t, which will be described with referenceto a single collector.

lilach collector 4 is provided with a vertical row ol openings 8 on oneface thereof,

objects of the lnven and a second a parallel row of openings ill on thesame face.

t in the 'lhese two openings communicate with the in terior of thecollector, and extend into separate chambers l2 and it, respectively,said chambers being formed by the partition it extending verticallywithin the collector t. A bifurcated connecting tube member it isopening 8 and it, the single end it of each memher it being fittedwithin each of the openings t and ill. To the bifurcated ends, theIll-shaped tubes of heating elements 6 are connected. Each Ill-shapedtube comprises an inner tube M and an outer tube to which extendlongitudinally of the boiler. The'tubes extending from the openingssteam inlet chamber ii! are directed horiaontally of then are directeddownwardly to the openings l t communicating with chamber l t on thesteam condensate return side of the partition l6. As shown in Fig. 3,the opening 8 for each tube is vertically displaced with respect to theopening ill for each tube to, El).

Each collector t therefore has attached to it a vertical row of tubes toform the heating element 6, the tubes being multiplied in number bymeans of the bifurcated connection l 8. Of course, even a greaterseparation of the tubes can be obtained by using a suitable connectingmember. The

v Block 28 is tubes are smaller than the customary vaporizing tubes andpresent a greater heat exchange sur .face to the boiler l; While thecollectors I need be only Wide enough to receive the single ends l9 ofthe members it. Individual collectors l in each row are spaced apart,and the rows of collectors are spaced so that the collectors can be madeaccessible for cleaning and repair. Opposite each of the openings 8 andII) in each collector, corresponding openings are made in which plugs 29are inserted, which plugs are removable for the purpose of cleaningtubes.

The base of each collector l is recessed to pro vide a shoulder 22 whichis seated in a corresponding shoulder it in the bottom of boiler 2,

. the boiler thickened at this point as shown at 24. p

of thecollector 4 is formed as a tube bent relative to collector 4 tohave its radially of the circular boiler 2, note 4. A block 28 isthreaded to tube 26. bored and threaded at 30, and bolts 32 passingthrough openings 30 hear at their ends against thickened portion 24 ofthe boiler, and pull the collector 4 into firm engagement with the wallof the boiler. A second block 34 is placed The outlet 26, which is axisextend Figs. 3 and .over the end or tube 26 and is held thereagainst bythe bolts 32 which freely pass through holes in provided for each theboiler to the blight of the U, and

block 34, the engagement being maintained by nuts 36.

Block 34 is bored to provide an inlet steam passage 38, and an outletsteam or condensate passage 40, these passages communicating,respectively, with the chambers I2 and H on opposite sides of partitionl6. Of course, passages 38 and 40 are connected by proper means such aspipe lines 42, M to the primary steam generating system.

Having now described a means by which the objects of this invention areobtained, What is claimed is: Y

1. In a boiler drum having heat exchange tubes, a collector comprising avertically mounted hollow member having an end portion projectingthrough the wall of said drum, partition means for dividing saidcollector into two chambers, vertically xtending rows of aperture meansin one side of said collector for providing communication with saidtubes, shoulder means for seating said collector against the innersurface of the wall of said drum, 8. block externally of said drumfastened to said projection end portion, a second bored block cappingsaid end portion and providing communication means for said chambers,respectively, and bolt means freely passing through said second blockand threaded through said first block and bearing against said drum.

2. A device for fastening the end of a collector which projects throughthe wall of a drum comprising a block fastened to the projecting end ofsaid collector, a second bored block capping said end and providingcommunication means for the interior of said collector, and bolt meansfreely passing through said second block and threaded through said firstblock and bearing against said drum.

HANS TREDE.

